The baskets have a panel that slides off, but once you get it off it's almost impossible to put back on. It's also made of thin, cheap plastic that breaks really easily. I did pull out the existing media and on one of the baskets I have Chaetomorpha in the upper two boxes and Purigen in the bottom. On the other side I have filter floss and Chemi-Pure Elite. I don't know if that's overkill, but a friend who has had tanks for years suggested the setup. I may end up doing a little DIY project to get something better in place.